Text & Developer Tools
Text & Developer Tools Calculators
Inspect, transform, validate, and improve text, metadata, and structured content.
15 tools
Keyword Density Calculator
Keyword density calculator: keyword share of a text.
Morse Code Converter
Morse code converter: text to Morse and back.
UUID Generator
UUID generator: version 4 UUIDs for developers.
Email Preview Tester
Preview sender, subject line, and preheader truncation across representative inbox layouts. Runs privately in your browser.
JSON Formatter
Format, validate, and pretty-print JSON instantly in your browser. Fix errors with a clear message and line pointer.
Password Generator
Generate strong random passwords with configurable length and character sets, with entropy and strength rating. Local and private.
Slug Generator
Turn any headline or phrase into a clean, URL-friendly slug instantly in your browser. SEO-ready output with a one-click copy.
Color Picker
Choose a color, inspect HEX, RGB, HSL, HSV, and CMYK values, and copy formats locally.
Country Facts and Comparison
Browse country facts , capital, region, currency, languages, and flags , and compare two countries side by side.
Folder to Prompt
Turn a local project folder into a structured AI prompt without uploading its files.
Meta Tag Generator
Generate meta tags and social preview strings.
Readability Calculator
Score text readability and grade level.
Subnet Calculator
Calculate network address, broadcast, usable host range, subnet mask, and wildcard for any IPv4 address and CIDR prefix.
Typing Test
Measure words per minute, accuracy, errors, and progress with a local timed typing test.
Word Counter
Count words, characters, sentences, and reading time.